Power-transmitting apparatus.



A. PLAGMAN. POWER TRANSMITTING APPARATUS. APPLIOATION FILED JUNE 1,1911. RENEWED APR. 16, 1912. 1,026,998.

Patented May 21, 1912.

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ADOLPI-I PLAG-MAN, OF DAVENPORT, IOWA.

POWER-TRANSMITTING APPARATUS.

Specification of Letters Patent.

Patented May 21, 1912.

Application filed June 1, 1911, Serial No. 630,700. Renewed April 15,1912. Serial No. 691,004.

To all whom it may concern.

Be it known that I, ADOLPH PLAGMAN, a citizen of the United States,residing at Davenport, in the county of Scott and State of Iowa, haveinvented certain new and useful Improvements in Power-TransmittingApparatus, of which the following is a specification.

This invention relates to an improvement in power transmission devicesand more particularly to a device of this character which is especiallyadapted for transmitting power to light machinery, such as lathes, jigsaws, washing machines and the like.

The object of the invention is the provision of a simple and efficientpower transmission device of this character which may be operated eitherby hand or foot power or by both hand and foot power.

Further objects of the invention will be apparent from the detaileddescription hereinafter when read in connection with the accompanyingdrawings, wherein a convenient embodiment of the invention isillustrated and wherein like characters of reference refer to similarparts in the several views.

In the drawings :Figure 1 is a side elevation of the improved powertransmission device; Fig. 2 is a cross section on line 2-2 of Fig. 1,and Fig. 3 is a detailed view of the clutch pinion.

Referring now more particularly to the drawings, the parts of the powertransmission device are carried by a stand which comprises connectedparallel base members A A,

. the ends of which are connected by cross pieces B B, from the centralportions of which extend vertical uprights B B, the upper ends of whichare provided with transversely extending portions 7) which are bolted orotherwise rigidly secured to the underside of a table C, whichconstitutes the support for the machinery which is to be driven.

J ournaled in suitable bearings formed in the uprights B B is atransversely extending shaft D, the end of which projects at one side ofthe supporting stand of the device and has keyed 'or otherwise rigidlysecured thereon a pulley D from which the power from the shaft D may betrans mitted by a suitable belt to the shaft of the machine which isintended to be driven. The other end of the shaft D may also, if

desired, be extended beyond the other side ofthe stand and provided witha similar drlving pulley, so that the device may be used to transmitpower to two or more machines.

Keyed or otherwise rigidly secured to the shaft D intermediate thevertical standards B B of the stand is a fly wheel D and keyed to theshaft alongside of said fly wheel is a small pinion D Projectinglaterally from one of the vertical standards B directly above the shaftD is a stub shaft E upon which is mounted a large inion E which mesheswith the small pinlon D carried by the shaft D. The pinion E is spacedfrom the standard B from which the shaft E projects and the face of saidpinion adjacent said standard is provided with an annular depression etherein and with a boss 6 positioned centrally of said depression.

F designates a circular clutch plate which is of a size to fit withinthe circular depression 6 in the side of the gear wheel E, said clutchplate being provided with a central opening fitting over the boss 6 ofthe gear wheel E. The clutch plate F is provided on its inner surfacewith an oval shaped boss f surrounding the central opening therein, theends of which boss are provided with recesses f therein. Lying upon theinner face of the clutch disk F are a pair of clutch dogs F, each ofwhich is angular in shape and is provided at the angular portion thereofwith a nib or projection f which is adapted to loosely fit in one of thedepressions f in the end of the boss f projecting from the clutch plate.One arm of each of the dogs F projects outwardly beyond the periphery ofthe clutch disk F and is provided with a foot f which is adapted, whenthe dogs F are rocked by movement of the clutch plate in one direction,to frictionally engage the wall of the circular depression a in the sideof the pinion E so as to cause such pinion to rotate with the clutchplate. Rocking movement of the dogs F on the clutch plate is limited bymeans of suitable studs or pro jections f which project from the innerface of said clutch plate and lie on opposite sides of the arms of saiddogs.

G designates a small pinion which is loosely mounted on the shaft E andis rotatable with the clutch plate F. The pinion G may be made separatefrom the clutch plate F and bolted to the exterior thereof or the pinionand clutch may be made integral if desired.

From the above description it will be apparent that when the pinion Gris rotated in one direction, the large pinion IE will rotate therewithand will, through itsconnection with a pinion D rotate the shaft D,

with, so that as the lever H is swung on its pivot, the pinion G will berotated.

Projecting forwardly from the lower end of the arm or lever H is an armI which is provided at its forward end with a foot piece or treadle I.The arm or lever H, the curved rack H, and the arm I are convenientlycast together, although if desired, these parts may be made separate.

H designates a coil spring, one end of which is secured to the lever orarm H adj acent the lower end thereof and the other end of which isconnected in any suitable manner to the rear portion of the stand orframe of the device. The coil spring H tends to normally draw the leverH rearwardly.

K designates a horizontally disposed lever which underlies the table Cof the stand and is provided at its rear end with an upturned portionlcwhich is pivotally connected in any suitable manner to one of thetransversely extending portions 6 of the supporting standards B of thestand. The forward end of the lever K projects beyond the front of thetable G and terminates in an upwardly extending portion is to which isrigidly connected an upwardly extending hand operating lever K. A link Lis pivotally connected at its upper end to the horizontally disposedlever K intermediate the ends thereof and at its lower end to the arm Iwhich projects forwardly from the lower end of the lever Ha Thehorizontally disposed lever K and the arm I are preferably provided witha series of openings therein through which the pivot bolts which connectthe link L therewith are adapted to pass so that the point of connectionof such link with the lever K and the arm I may be adjusted to suit theoperator.

From the above description it will be seen that the device may beoperated either by the hand lever K. or the treadle or foot piece I, orby both the hand lever and treadle, as the operator may desire.

While a convenient embodiment of the invention is illustrated in theaccompanying drawings, it will be understood that many changes may bemade to the form and construction therein shown without departing fromthe spirit and scope of the invention as defined in the appended claims.What I claim is:

1. In a device of the character described, a stand comprising asupporting base, standards extending upwardly therefrom, a power shaftjournaled in such standards, a shaft mounted in said stand above saidpower shaft, a pinion on the power shaft, a pair of pinions on saidother shaft, one of said pinions meshing with the pinion on the powershaft, clutch mechanism between said pair of pinions, an upwardlyextending lever fulcrumed at its lower end to the supporting base ofsaid stand and provided at its upper end with a curved rack bar meshingwith the free pinion on the shaft above the power shaft, said leverbeing provided with an actuating arm extending laterally from the lowerend' thereof.

2. In a device of the character described, a stand comprising asupporting base, and a table supported thereby, a power transmittingshaft journaled in said stand, and means for transmitting power to saidshaft including a pinion rotatably mounted in the stand, a leverpivotally connected at its lower end to the supporting base of saidstand and provided at its upper end with a curved rack bar meshing withsaid pinion, a V

laterally extending arm rigidly connected to said lever and provided atits free end with a foot piece, a hand lever provided with ahorizontally extending portion underlying the table and pivotallyconnected at its free end to the upper portion of said stand, and a linkpivotally connecting the horizontally extending portion of said handlever and the laterally extending arm of said first mentioned lever.

3. In a device of the character described, a stand comprising asupporting base, a table supported thereby, a power transmitting shaftjournaled in said stand, and means for rotating said shaft including apinion loosely mounted in said. stand, a lever pivotally supported atits lower endto the supporting base of said stand and provided at itsupper end with a rearwardly extending curved rack meshing with saidpinion and at its lower end with a forwardly extending arm rigidtherewith, a foot piece carried by said forwardly extending arm, a handlever fulcrumed to the stand, and a connection between said hand leverand the forwardly extending arm of said first mentioned lever.

4. In a device of the character described, a stand comprising asupporting base, a pair of uprights extending therefrom and a tablesupported by the upper end of said uprights, a power transmitting shaftjournaled in the uprights of said stand, a shaft extending from one ofthe uprights of said stand and positioned above said power transmissionshaft, a pinion loosely mounted on said shaft, gearing for actuatingsaid power shaft when said pinion is rotated in one direction, a leverpivotally supported at its lower end to the supporting base of saidstand and provided at its upper end with a rearwardly extending curvedrack bar meshing with said pinion, and at its lower end with a forwardlyextending arm rigid therewith, a foot piece carried by said forwardlyextending arm, a hand lever provided at its lower end with ahorizontally extendin ortion underlying the table, and provi so at itsfree end with an upturned portion pivotally connected to the up erportion of the stand, and a link pivotaily connectin the horizontallyextendlng portion of saidaand lever and the forwardly extending arm ofsaid first mentioned lever.

In testimony whereof I affix my signature in presence of two witnesses.

ADOLPH PLAGMAN. Witnesses:

J. E. CRAWFORD, G. E. LAU.

Copies of this patent may be obtained for flve cents each, by addressingthe Commissioner of Patents, Washington, D. G.

